Imputed righteousness is the theological idea that God legally credits the perfect righteousness of Jesus Christ to a believer at the moment of justification. This act is a legal declaration, not an internal change. God declares the believer to be righteous in His sight, not based on their own merits or works, but based entirely on the merits of Christ (Rom 4:3-5).

This concept involves what is often called the “great exchange” (2 Cor 5:21). At the cross, Christ took the believer’s sin upon Himself, bearing the just penalty for it. In return, God imputes or credits Christ’s perfect righteousness to the believer’s account. Therefore, when God looks at the believer, He sees the righteousness of His Son (Phil 3:9).

Imputed righteousness is distinct from imparted righteousness. “Imputed” refers to the believer’s legal standing before God; it is an external, judicial act of declaration. “Imparted” righteousness refers to the internal, progressive work of the Holy Spirit in sanctification, where the believer is gradually made more holy in practice, actually possessing the righteousness of Christ in gradually increasing degrees.

The doctrine of imputed righteousness is the foundation of a believer’s assurance. It means their right standing with God does not depend on their inevitable fluctuating performance, but on the unchanging and perfect work of Christ.